What other registries can an ISR mare be approved for?

Hi all,
I have a mare who should have received Oldenburg NA papers, but she was not taken to her inspection before age 3 and so she was given ISR papers instead. Her foals by Oldenburg NA stallions receive Old NA papers but I am wondering if there are any other registries she can be approved for to widen my stallion options for her? Thanks!

It will likely depend on her full pedigree as it if she will be eligible for other registries and if so, in what book. If you have a preferred registry or two, I’d suggest sending in a copy of her papers and asking if she’d be eligible for inspection.